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Rails: Missing host to link to! Please provide :host parameter or set default_url_options[:host]

...t have an answer to this. Where do I set default_url_options ? I've already set it for config.action_mailer.default_url_options to solve this same bug elsewhere, but now I'm getting this error when trying to use a URL helper inside an RSpec spec. I have no idea where it's expecting default_url...
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How much is the overhead of smart pointers compared to normal pointers in C++?

How much is the overhead of smart pointers compared to normal pointers in C++11? In other words, is my code going to be slower if I use smart pointers, and if so, how much slower? ...
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Is there a way to stop Google Analytics counting development work as hits?

I have added the JavaScript that I need to the bottom of my pages so that I can make use of Google Analytics. Only problem is that I am sure that it is counting all my development work as hits. Seeing as I probably see some of those pages a hundred times a day it will really skew my readings. Is the...
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Setting PATH environment variable in OSX permanently

I have read several answers on how to set environmental variables on OSX as permanently. 6 Answers ...
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What's the difference between dynamic (C# 4) and var?

I had read a ton of articles about that new keyword that is shipping with C# v4, but I couldn't make out the difference between a "dynamic" and "var". ...
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Install NPM into home directory with distribution nodejs package (Ubuntu)

... NPM will install local packages into your projects already, but I still like to keep the system away from my operating system's files. Here's how I suggest compartmentalizing Nodejs packages: Install Nodejs and NPM via the chris-lea PPA. Then I set up a package root in my homedir...
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Local Storage vs Cookies

I want to reduce load times on my websites by moving all cookies into local storage since they seem to have the same functionality. Are there any pros/cons (especially performance-wise) in using local storage to replace cookie functionality except for the obvious compatibility issues? ...
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Pure JavaScript equivalent of jQuery's $.ready() - how to call a function when the page/DOM is ready

With jQuery, we all know the wonderful .ready() function: 10 Answers 10 ...
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How may I reference the script tag that loaded the currently-executing script?

How can I reference the script element that loaded the javascript that is currently running? 14 Answers ...
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UIView with rounded corners and drop shadow?

...rs and received a simple design request: Round the corners on a UIView and add a drop shadow.To do as given below. 33 Answe...